How to upgrade Troops to tier VI?
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How to upgrade Troops to tier VI?
You need to research technology.
In "Basic combat" you'll find "cavalry upgrading I or II (you can upgrade Tier 1-3 and 4-6 to the higher Tier you have available.
In Cavalry training you'll fine "cavalry upgrading III" to upgrade tier 7-9 to the higher Tier available.
Same thing with archers or footmen.
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